It saves 40% [[Coal]] in comparison to normal [[Furnace|Furnaces]]. Additionally around half the time an extra bar is produced, when this happens 50% of the [[Coal]] and one sixth of the ore is saved in comparison to normal [[Furnace|Furnaces]]. | It saves 40% [[Coal]] in comparison to normal [[Furnace|Furnaces]]. Additionally around half the time an extra bar is produced, when this happens 50% of the [[Coal]] and one sixth of the ore is saved in comparison to normal [[Furnace|Furnaces]]. |